All laws together.
Perhaps the following image will be of aid:
This is Supervenience.
1) The elementary particles aren't particles (the standard interpretation of the standard model of particle physics is that certain elementary particles are the carriers of fundamental forces and the others are described dynamically in quantum field theory as exchanges in these fields)
2) Molecular properties can't be explained by atomic theory or particle physics or any physics beyond those in molecular sciences:
"The most fundamental question that one might be expected to answer is ‘‘why are there solids?’’ That is, if we were given a large number of atoms of copper, why should they form themselves into the regular array that we know as a crystal of metallic copper? Why should they not form an irregular structure like glass, or a superfluid liquid like helium? We are ill-equipped to answer these questions...such a task is impossible
Taylor, P. L., & Heinonen, O. (2002).
A Quantum Approach to Condensed Matter Physics. Cambridge University Press.
3) There are no "elementary" particles. That is to say, we are free to choose whether we e.g., consider all known physics to be built upon the dynamics of fermions (taking them to be the most elementary category of particles), or to take bosons as fundamental and regard the fermions as topological "kinks" in bosonic fields. And, of course, the prevailing view is that of "effective field" theories in QFT (and particle physics), such that the required renormalization which introduces a mathematical trick to make fundamental theories which predict elementary particles to have infinite masses and energies, forcing them to be finite, are mere approximations to more fundamental theories.
4) Emergence introduced in the 70s by Anderson addressed just this question and even then concluded that one cannot derive "higher-level" scientific descriptions in e.g., the theoretical frameworks in condensed matter physics, quantum optics, chemistry, biology, etc., to some fundamental theory in physics,
even in theory/principle.
5) Many of the most important "laws" of physics (e.g., that of energy conservation, entropy, and even the existence of "time" or "heat") are derived from irreducibly statistical theories and/or statistical physics. Even in classical physics, we find that phenomenological processes and properties of/from physical systems and their interactions are not reducible either to their "parts" or the "laws" governing the interactions of these parts.
6) There exists nothing remotely resembling a theory of atomic physics (let alone elementary particle physics) of any living system, from intracellular dynamics to organisms. Nor is there any hint that there will be any other than via assumption.